Hydrazine hydrate (1:1) → HCID 86745082, compound

Participants

Reaction Steps

A solution of [4-(2,2-dimethylpropionamido)-3-pyridinyl]-2-fluorophenylmethanone (9.8 g)and hydrazine monohydrate (3.3 g) in 100 mL ethanol was stirred at reflux for five hours, cooled, stirred with ice-water and extracted with ethyl acetate-ether. The dried organic layer was filtered and evaporated. The residue was eluted through silica with dichloromethane then 15% ethyl acetate in dichloromethane via flash column chromatography and then was triturated with hexane-ether to yield 7 g of [4-(2,2-dimethylpropionamido)-3-pyridinyl]-2-fluorophenylmethanone-hydrazone, as a solid, m.p. 78°-82° C. Four grams were converted to the maleate salt in methanol-ether and thereafter recrystallized from methanol-ether to yield 2.3 g of crystals, d 161°-162° C.

Provenance & Evidence